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  1. or download this
    sub mysub { 
    my @array = @$_[0];    # Makes a copy. Not efficient.
...
my @a = (1 .. 10);
 
mysub(\@a);    # \@a is a reference to the array @a.
  2. or download this
    mysub { 
    my @array = @_;    # Copying again. Not efficient.
...
my @a = (1 .. 10); 

mysub(@a);    # Send the array as @_
  3. or download this
    mysub {
    my ($arrayref) = @_;
...
my @a = (1 .. 10); 

mysub( \@a );